Talking machine



March 10, 19 L. LUMIERE TALKING MACHINE Filed April 3O, 1925 Patented Mar. 1%, 1931 LOUIS LUMILBE, OF LYON, FRANCE TALKING MACHINE Application filed April so, 1925, Serial no.

This inventionrelates to improvements in talking machines and in particular to improvements in the mounting of the needle holder upon the ring or casing in which the 5 diaphragm is mounted. V

V The object of the invention is to obtain a more effective transmission 01": the vibrations of the reproducing needle to the diaphragm.

Hitherto, the common practice in talking machines has been to mount'the needle holder upon the diaphragm holding ring, or upon the sound box, so that it oscillates about an axis lying in or parallel to the plane of the diaphragm. According to the present invention the needle holder is mounted to oscillate about an axis lying at right angles to the plane of the diaphragm. The present invention is particularly applicable in connection with diaphragms of large diameter.

These diaphragms, which may be 1201 more inches across, are usually mountedin a holding ring which in turn is carried on one side by a spider. Although these rings are made as rigid as possible, they nevertheless, of course, present greater rigidity in the direction of the plane of the diaphragm than they do in a direction at right angles to that plane.

The part upon which the oscillating needle holder is mounted should be as rigid and as resistant as possible, in order that the vibras tions of the needle point may be transmitted without loss to the diaphragm and with a needle holder mounted in accordance with the present invention the diaphragm holding ring opposes its greatest rigidity to the vibrations of the needle. I

One method of carrying out the invention is illustrated in the accompanying drawings in which Fig. 1 is a part elevation of a diaphragm of large diameter'in which the needle holder is mounted in accordance with the presentinvention. 7

Fig. 2 is a sectional side elevation taken on the line Q2 of Fig. 1.

The diaphragm m is mounted in a ring a folded over the edge of the diaphragm an clamped thereon. The diaphragm is, in the construction illustrated, mounted to play in a vertical position. On the edge of the ring 27,024, and a smitten-cam May 26, 1924.

a, at the point nearest to the record when playing, is mounted a metal block b, secured by means of screws 0 or the like passed through the ring a. The block b may have the cross sectional form shown in Fig. 2 of the drawings, a recess Z being providedfor the reception of the edge ot the ring a. The needle holder 6 is mounted upon the block 6, being carried, for example, in well 'known manner upon a stifi leaf spring 7, having a very high vibration-frequency, one end of said spring 7 being clamped between metal plates 9, h, which are in turn screwed or bolted to the block 6, while the other end is clamped between a plate and the needle holder 6. Between a pair ofspring arms m extending laterally on one side of the needle holder 6 is secured one end of a transmission bar n running substantially radially of the diaphragm towards its centre, whereit is connected with the centre of the diaphragm by meansof an oscillating bell crank lever oand a rod p, said lever 0 being mounted for example upon the centre boss 9- of the spider a by an arrangement substantially similar to that by means of which the needle holder 0 is secured to the block b. In the form shown the boss 9 is provided with. a

small opening in its center, but said opening may be omitted without'affecting the opera tion of the device. y g It will be readily seen that in the arrangement above described, the axis of oscillation of the needle holder 6 lies atright angles to the plane of the diaphragm. With the arrangement'above described, the stresses communicated to thefdiaphragm holding ring by the vibration of the needle holder during'reproduction are in a dir.ec-;- tion in or parallel to the plane of the diaphragm and of thediaphragm holding ring,

and the maximum resistance is otlered to any movement of the plates ,9, h holding the spring. It will also be understood that where the diaphragm is arranged to play in a vertid cal position these stresses are communicated to the diaphragmholding ring in a direjction which runs substantially through the centre of gravity of the diaphragm'holding ring.

I claim:

1. Apparatus of the class described comprising diaphragm means having a needle holder resiliently mounted thereon to oscillate about an axis lying substantially at right angles to the plane of the diaphragm.

2. Apparatus as claimed in claim 1, said needle holder being carried by a leaf spring lying in a plane at right angles to the plane of the diaphragm, said spring being secured at one end to the needle holder and at the other end being operatively connected to the diaphragm means.

3. In apparatus of the class described, the combination of a diaphragm, a diaphragm holding ring, a needle holder mounted on said ring to oscillate about an axis substantially at right angles to the diaphragm, and means including a longitudinally movable transmitting arm for transmitting the oscillations of the needle holder to the diaphragm.

4. In a device of the class described, a diaphragm, a diaphragm holding ring, a needle holder, resilient means for mounting said holder on said ring to oscillate about an axis substantially at right angles to the plane of the diaphragm, and means including a transmitting arm operatively connecting the diaphragm and needle holder for transmitting oscillations of the latter to the diaphragm.

5. In a device of the class described, a diaphragm, a diaphragm holding ring, a needle holder, resilient means for mounting said needle holder on said ring, said means extending substantially at right angles to the plane of the diaphragm and supporting said needle holder to oscillate about an axis substantially at right angles to said diaphragm, a transmitting arm operatively connected to said needle holder, and means for connecting said transmitting arm with saiddiaphragm.

6. In a device of the class described, in combination, a diaphragm, a needle holder resiliently mounted to oscillate about an axis substantially at right angles to said diaphragm, operative connections between said needle holder and diaphragm, and common means for mounting said needle holder and diaphragm, said means being so constructed and arranged that the stresses received by said mounting means from said needle holder being exerted in a direction substantially.

parallel to the plane of the diaphragm.

7. In apparatus of the class'described, the combination of a diaphragm, a diaphragm holding ring, a needle holder mounted on said ring to oscillate about an axis substantially at right angles to the plane of the diaphragm, and means including connections pivoted about a substantially horizontal axis substantially at right angles to said first axis for transmitting the oscillations of said needle holder to the diaphragm.

8. In a device of the class described, a diaphragm, a diaphragm support, a needle holder mounted on said support to oscillate about an axis substantially at right angles to the plane of the diaphragm, a transmitting arm operatively connected to said needle holder, and means including a bell crank lever mounted on said support for connecting said transmitting arm with said diaphragm.

9. In a device of the class described, a diaphragm, a diaphragm support, a needle holder, resilient means for mounting said needle holder on said support to oscillate about an axis substantially at right angles to the plane of the diaphragm, a transmitting arm operatively connected to said needle holder, and a bell crank lever resiliently mounted on said support, one arm of said lever being connect-ed to said transmitting arm and the other arm to said diaphragm.

10. In a deviceof the class described, a

diaphragm, a diaphragm support, a needle holder, resilient means for mounting said needle holder on said support to oscillate about an axis substantially at right angles to the plane of the diaphragm, a transmitting arm operatively connected to said needle.

holder, a bell crank lever, and resilient means for mounting said lever on said support to oscillate about an axis substantially parallel to the plane of the diaphragm, one arm of said lever being connected to said transmitting arm and the other arm to said diaphragm.

In testimony whereof I have signed my name to this specification.

LOUIS LUMIERE. 

